law enforcement is totally for the brady law. and the idea that felons or people who are mentally infirm or people who are spousal abusers should be allowed to buy guns, most everyone agrees on that, even -- >> but there's no overwhelming evidence of the assault weapons ban dramatically reduced this incident of violence, nor was there an uptick in this sort of violence once the law lapsed. >> during the 10 years that the assault weapons ban was in effect, the use of those weapons in crime went down a significant percent an. >> senator, is there any gun regulation, any restriction of gun rights, you could accept or vote for? >> sure. i think the fact that we have background checks with people buy firearms and we prevent felons and those with serious mental illness acquiring them, those make perfect sense. >> so a background check is something you could support? >> well, the background checks are in place when a licensed firearms dealer sells firearms. and there's a lot of room for improvement -- >> but 45% of sales are citizen to